There are older restaurants, but for example, Cafe Procope in Paris (https://en.wikipedia.org/wiki/Café_Procope https://en.wikipedia.org/wiki/Café_Procope) was

There are older restaurants, but for example, Cafe Procope in Paris (https://en.wikipedia.org/wiki/Café_Procope https://en.wikipedia.org/wiki/Café_Procope) was opened in 1686, and is still in operation. It was worth it for me to eat at a place where (for example) Voltaire and Benjamin Franklin ate.